let obj = {
    id: 1,
    name: "xiaowang"
}

console.log(Object.hasOwnProperty.call(obj, "id"));
console.log(Object.prototype.hasOwnProperty.call(obj, "id"));
console.log(Object.hasOwnProperty);
console.log(Object.getOwnPropertyNames(obj));
// console.log(Object.toString.call(obj));

